Nagios Support Forum

Hi
I am new to nagios and I have setup nagios core server and I am using nrpe for client monitoring. I have download check_disk_snmp plugin from nagios site and it working thru command line but in my web interface showing unknown disk.

From nagios server I can run this command to client.

[root@sove1 ~]# /usr/local/nagios/libexec/check_disk_snmp -t 10.128.xxx.xx -w 85% -c 95% -p public -x '^/' -i '/sftp'
DISK OK - free space: /sftp 51.6gb;

where 10.128.xxx.xx is my client IP

Above script is perl script and use snmpwalk command and gather information from remote client.

Can some one please tell me what is correct format that nagios core will accept information from plugin.

Thanks

Sanjay

I have enable debugging in nagios core and now I can see nagios core running same command and using same parameter which I have mentioned earlier but core is showing unknown status.

[1402333727.734899] [016.1] [pid=725] Checking host 'ginsftp01' for flapping...
[1402333756.719459] [008.0] [pid=725] ** Service Check Event ==> Host: 'ginsftp01', Service: 'SFTP Volume', Options: 0, Latency: 0.000000 sec
[1402333756.719483] [016.0] [pid=725] Attempting to run scheduled check of service 'SFTP Volume' on host 'ginsftp01': check options=0, latency=0.000000
[1402333756.719593] [016.0] [pid=725] Checking service 'SFTP Volume' on host 'ginsftp01'...
[1402333756.719811] [2048.1] [pid=725] Processing: ''/sftp''
[1402333756.719819] [2048.1] [pid=725] Done. Final output: ''/sftp''
[1402333756.719867] [2048.1] [pid=725] Done. Final output: '/usr/local/nagios/libexec/check_disk_snmp -t 10.128.132.17 -w 85% -c 95% -p public -x '^/' -i '/sftp''
[1402333756.814625] [016.0] [pid=725] ** Handling check result for service 'SFTP Volume' on host 'ginsftp01' from 'Core Worker 733'...
[1402333756.814637] [016.1] [pid=725] HOST: ginsftp01, SERVICE: SFTP Volume, CHECK TYPE: Active, OPTIONS: 0, SCHEDULED: Yes, RESCHEDULE: Yes, EXITED OK: Yes, RETURN CODE: 3, OUTPUT: DISK UNKNOWN
[1402333756.814705] [016.0] [pid=725] Scheduling a non-forced, active check of host 'ginsftp01' @ Mon Jun 9 18:09:16 2014
[1402333756.814812] [016.1] [pid=725] Checking service 'SFTP Volume' on host 'ginsftp01' for flapping...
[1402333756.814853] [016.1] [pid=725] Checking host 'ginsftp01' for flapping...


My hosts.cfg files are mentioned below

define service{
use generic-service ; Name of service template to use
host_name ginsftp01
service_description SFTP Volume
check_command check_disk_snmp!85%!95%!'^/'!'/sftp'
}

command.cfg file

define command{
command_name check_disk_snmp
command_line $USER1$/check_disk_snmp -t $HOSTADDRESS$ -w $ARG1$ -c $ARG2$ -p $USER3$ -x $ARG3$ -i $ARG4$
}

Please help me

Thanks

Sanjay

Hi Sanjay,
I have a feeling that the /sftp disk is not mounted for the user nagios (or nagios doesn't have permission to it).

I notice you are executing your tests on the CLI as root. When Nagios executes checks it does it as the user nagios.

Test your command as follows: Do you get the DISK UNKNOWN error now? if so, resolve the problem with the nagios user not seeing /sftp.

Hi

su - nagios
[nagios@sov-srv-negios01 ~]$ /usr/local/nagios/libexec/check_disk_snmp -t 10.128.132.17 -w 85% -c 95% -p public -x '^/' -i '/sftp'
No log handling enabled - turning on stderr logging
snmpwalk: No securityName specified (Sub-id not found: (top) -> hrStorage)
DISK UNKNOWN

In my earlier post you can see nagios core is getting same out put but it good finding.

Thanks
Sanjay

Hi

I have sort out this issue and now put is same as above

[nagios@sov-srv-negios01 .snmp]$ /usr/local/nagios/libexec/check_disk_snmp -t 10.128.132.17 -w 85% -c 95% -p public -x '^/' -i '/sftp'
DISK OK - free space: /sftp 51.6gb;
[nagios@sov-srv-negios01 .snmp]$

Sanajy

Hi

I have enable debugging and run the same command so more details log

[1402389660.465478] [016.0] [pid=6490] Attempting to run scheduled check of service 'SFTP' on host 'ginsftp01': check options=0, latency=0.000000
[1402389660.465485] [001.0] [pid=6490] run_async_service_check()
[1402389660.465491] [001.0] [pid=6490] check_service_check_viability()
[1402389660.465497] [001.0] [pid=6490] check_time_against_period()
[1402389660.465507] [001.0] [pid=6490] _get_matching_timerange()
[1402389660.465516] [001.0] [pid=6490] check_service_dependencies()
[1402389660.465524] [064.1] [pid=6490] Making callbacks (type 6)...
[1402389660.465530] [016.0] [pid=6490] Checking service 'SFTP' on host 'ginsftp01'...
[1402389660.465538] [001.0] [pid=6490] get_raw_command_line_r()
[1402389660.465545] [001.0] [pid=6490] process_macros_r()
[1402389660.465551] [2048.1] [pid=6490] **** BEGIN MACRO PROCESSING ***********
[1402389660.465557] [2048.1] [pid=6490] Processing: '80%'
[1402389660.465564] [2048.1] [pid=6490] Done. Final output: '80%'
[1402389660.465570] [2048.1] [pid=6490] **** END MACRO PROCESSING *************
[1402389660.465575] [001.0] [pid=6490] process_macros_r()
[1402389660.465581] [2048.1] [pid=6490] **** BEGIN MACRO PROCESSING ***********
[1402389660.465586] [2048.1] [pid=6490] Processing: '90%'
[1402389660.465592] [2048.1] [pid=6490] Done. Final output: '90%'
[1402389660.465598] [2048.1] [pid=6490] **** END MACRO PROCESSING *************
[1402389660.465603] [001.0] [pid=6490] process_macros_r()
[1402389660.465608] [2048.1] [pid=6490] **** BEGIN MACRO PROCESSING ***********
[1402389660.465613] [2048.1] [pid=6490] Processing: ''^/''
[1402389660.465619] [2048.1] [pid=6490] Done. Final output: ''^/''
[1402389660.465625] [2048.1] [pid=6490] **** END MACRO PROCESSING *************
[1402389660.465630] [001.0] [pid=6490] process_macros_r()
[1402389660.465636] [2048.1] [pid=6490] **** BEGIN MACRO PROCESSING ***********
[1402389660.465641] [2048.1] [pid=6490] Processing: ''/sftp''
[1402389660.465647] [2048.1] [pid=6490] Done. Final output: ''/sftp''
[1402389660.465652] [2048.1] [pid=6490] **** END MACRO PROCESSING *************
[1402389660.465658] [001.0] [pid=6490] process_macros_r()
[1402389660.465663] [2048.1] [pid=6490] **** BEGIN MACRO PROCESSING ***********
[1402389660.465668] [2048.1] [pid=6490] Processing: '$USER1$/check_disk_snmp -t $HOSTADDRESS$ -w $ARG1$ -c $ARG2$ -p $USER3$ -x $ARG3$ -i $ARG4'
[1402389660.465694] [2048.1] [pid=6490] Done. Final output: '/usr/local/nagios/libexec/check_disk_snmp -t 10.128.132.17 -w 80% -c 90% -p public -x '^/' -i '/sftp''
[1402389660.465701] [2048.1] [pid=6490] **** END MACRO PROCESSING *************
[1402389660.465709] [064.1] [pid=6490] Making callbacks (type 6)...
[1402389660.465722] [001.0] [pid=6490] macros_to_kvv()
[1402389660.465764] [001.0] [pid=6490] clear_volatile_macros_r()
[1402389660.465776] [001.0] [pid=6490] handle_timed_event() end
[1402389660.465784] [064.1] [pid=6490] Making callbacks (type 1)...
[1402389660.465792] [008.1] [pid=6490] ** Event Check Loop
[1402389660.465806] [008.1] [pid=6490] Next Event Time: Tue Jun 10 09:41:04 2014
[1402389660.465813] [008.1] [pid=6490] Current/Max Service Checks: 1/0 (inf% saturation)
[1402389660.465821] [12288.1] [pid=6490] ## Polling 1500ms; sockets=14; events=28; iobs=0x1ff1140
[1402389660.558116] [001.0] [pid=6490] handle_async_service_check_result()
[1402389660.558146] [016.0] [pid=6490] ** Handling check result for service 'SFTP' on host 'ginsftp01' from 'Core Worker 6502'...
[1402389660.558156] [016.1] [pid=6490] HOST: ginsftp01, SERVICE: SFTP, CHECK TYPE: Active, OPTIONS: 0, SCHEDULED: Yes, RESCHEDULE: Yes, EXITED OK: Yes, RETURN CODE: 3, OUTPUT: DISK UNKNOWN

Hi

Have you configured argument $USER3$ in /usr/local/nagios/etc/resource.cfg.

Add this to resource.cfg

$USER3$=public

OR

Change according to below

1. Add "public" in service defination
2. Change $ARG$ parameters in commands .cfg

define service{
use generic-service ; Name of service template to use
host_name ginsftp01
service_description SFTP Volume
check_command check_disk_snmp!85%!95%!public!'^/'!'/sftp'
}

command.cfg file

define command{
command_name check_disk_snmp
command_line $USER1$/check_disk_snmp -t $HOSTADDRESS$ -w $ARG1$ -c $ARG2$ -p $ARG3$ -x $ARG4$ -i $ARG5$
}


Tks
Rajesh Mehra

Hi

yes that line is already there and that reason core running below command.

[1402389660.465668] [2048.1] [pid=6490] Processing: '$USER1$/check_disk_snmp -t $HOSTADDRESS$ -w $ARG1$ -c $ARG2$ -p $USER3$ -x $ARG3$ -i $ARG4'
[1402389660.465694] [2048.1] [pid=6490] Done. Final output: '/usr/local/nagios/libexec/check_disk_snmp -t 10.128.132.17 -w 80% -c 90% -p public -x '^/' -i '/sftp''
[1402389660.465701] [2048.1] [pid=6490] **** END MACRO PROCESSING *************

Thanks

Sanjay

Just to clarify, the command works as root from the cli:

sanjayk wrote: [root@sove1 ~]# /usr/local/nagios/libexec/check_disk_snmp -t 10.128.xxx.xx -w 85% -c 95% -p public -x '^/' -i '/sftp'
DISK OK - free space: /sftp 51.6gb;

But does not work as user nagios from the cli:

sanjayk wrote:su - nagios
[nagios@sov-srv-negios01 ~]$ /usr/local/nagios/libexec/check_disk_snmp -t 10.128.132.17 -w 85% -c 95% -p public -x '^/' -i '/sftp'
No log handling enabled - turning on stderr logging
snmpwalk: No securityName specified (Sub-id not found: (top) -> hrStorage)
DISK UNKNOWN

As nagios runs the check as the user nagios, this would half explain your problems. What are the permissions on the script: Additionally, the following error: Usually implies snmp v3. what version of the snmp plugin are you running?

[root@sov-srv-negios01 ~]# su - nagios
[nagios@sov-srv-negios01 ~]$ ls -la /usr/local/nagios/libexec/check_disk_snmp
-rwxr-xr-x 1 nagios nagios 14451 Jun 9 16:44 /usr/local/nagios/libexec/check_disk_snmp
[nagios@sov-srv-negios01 ~]$ /usr/local/nagios/libexec/check_disk_snmp -V
/usr/local/nagios/libexec/check_disk_snmp version 2.2 last updated 05.05.2010
[nagios@sov-srv-negios01 ~]$ /usr/local/nagios/libexec/check_disk_snmp -t 10.128.132.17 -w 85% -c 95% -p public -x '^/' -i '/sftp'
DISK OK - free space: /sftp 51.6gb;
[nagios@sov-srv-negios01 ~]$